Team Luke SkywalkervsTeam Darth Vader

Team Darth Vader Luke vs Darth Vader
Yoda vs Darth Tyranuus
Obi-Wan Kenobi vs Darth Sidious
Leia vs Darth Maul
Mace Windu vs Kylo Ren
Qui-Gonn Jinn vs Darth Bane
Rey vs Darth Plagueis
Anakin Skywalker vs Darth Nihilus
Ahsoka Tano vs Darth Traya

First one down in Anakin as Nihilus uses Force Drain on him.

Nihilus goes for Yoda

Following her student's steps, Traya does the same to Ahsoka, she is the second to go down.

She also goes for Yoda noticing her student's hunger.

I'll also assume this Leia is closer to the version of the image (from around New Hope) and assume that Darth Maul basically one-shots her as well with Force Choke.

Seeing as Nihilus and Treya went for Yoda, Maul goes for Windu wanting a challenge.

Plagueis also immediatly easily dominates Rey and noticing her latent power wants to turn her to the Dark Side.

Luke vs Darth Vader
Yoda vs Darth Tyranuus, Darth Nihilus and Darth Traya
Obi-Wan Kenobi vs Darth Sidious
Mace Windu vs Kylo Ren and Darth Maul
Qui-Gonn Jinn vs Darth Bane
Rey vs Darth Plagueis

Yoda denies Nihilus his meal. Nihilus goes for Luke. Vader doesn't like it and is converted back into Anakin, but as he is about to slay Nihilus from the back, Traya intervenes.

Luke vs Darth Nihilus
Anakin Skywalker vs Darth Traya
Yoda vs Darth Tyranuus
Obi-Wan Kenobi vs Darth Sidious
Mace Windu vs Kylo Ren and Darth Maul
Qui-Gonn Jinn vs Darth Bane
Rey vs Darth Plagueis

Anakin is forced to watch helpessly as his son is Drained by Nihilus as Traya finishes him with Force Lightning. Having been unsuccesful to Drain Yoda, Nihilus now goes for Mace Windu, Traya follows after.

Seeing this display, Rey is incapable of denying the lure to the Dark Side and turns. Darth Plagueis sicks the Dark Rey on Obi-Wan (just to mess with Sidious, like implying he knows she is related to him), Sidious wouldn't mind his former master attempt of getting through his skin and would just join Tyrannus vs Yoda

Yoda vs Darth Tyranuus and Darth Sidious
Obi-Wan Kenobi vs Dark Rey (Darth Plagueis would just watch the match)
Mace Windu vs Kylo Ren, Darth Maul, Darth Nihilus and Darth Traya
Qui-Gonn Jinn vs Darth Bane

Yoda is the first one down overwhelmed. Darth Tyrannus now talks with Qui-Gonn, and for Obi-Wan's surprise, Qui-Gonn does turn to Tyrannus side, Plagueis finds this more entertaining and allows Tyrannus to sick the Dark Qui-Gonn on Obi-Wan.

Eventually the Dark Siders win.

Team Darth Vader Nihilus solos everyone but maybe Yoda but Sidious takes care of him.

Team Luke Skywalker Happy Star Wars Day! May the 4th be with you!

Hmmm, not at all the order I placed them in but at least they're all there I guess.